Type bed operating mechanism



(No Model.)

J. L. 00X. TYPE BBD UPERATING MBGHANISM.

No. 433,396. Patented July 29, 1890.

lllilHHllllllll I Snom/L `oz g i ma Noms versus co.. mmcruwa. msnmurun, n. c`

UNITED STATES PATENT OFFICE.

JOSEPH COX, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO THE DUPLEX.

' PRINTING PRESS COMPANY, OF SAME PLACE.

TYPE-BED-OPERATING lVlECHANlSIVl.

SPECIFICATION forming part of Letters Patent N o. 433,396, dated July 29, 1890. Application filed November 5, 1888. Serial No. 289,948 (No model.)

To all whom it may concern.l nular shouldersor rollers f, that run upon Be itknown thatI, JOSEPHL. COX, of Battle flanges e e, while the teeth of the pinions are Creek, in the county of Calhoun and State of engaged by racks E E. The rollers f f, it will 55 Michigamhave invented certain new and usebe observed, sustain the weight of shaft G ful Improvements in Type- Bed-Operating and the gear and pinions thereon by running Mechanisms; and I do hereby declare that upon the flanges e e, thereby relieving the the following is a full, clear, and exact deracksE and pinionsFfrom much of the strain scription thereof, reference being had to the and wearordinarilyineidentthereto, since the 6o` accompanying drawings, and to the letters of pinions do not bear upon the racks, but sim- Io reference marked thereon,which form part of p ly mesh therewith. This construction furthis specification, in which-- ther upholds gear Il in proper mesh with rack Figure l isadetailsectional view of aprint- D, so that the movement of the bed is less ing-press, showing a side elevation of my imaffected by wear of the teeth of the racks and 65 proved bed-operating mechanism. Fig. 2 is gears than any heretofore produced. The

a plan view of the bed-operating mechanism, teeth of gear H mesh with rack D, as shown. witlrthe bed` partly broken away to show the I is a connecting-rod attached to the wristgearing; and Fig. 3 is a cross-sectional view pin of crank b at one end and having its inof the same through the gears. ner end bifurcated and embracing the pin- 7o This invention is an improvement in bedions. The ends of shaft G are journalcd in :zo operating mechanisms for printing-presses, the arms of the bifurcations thereof.

which mechanism will converta rotary-crank The operation is as follows: Motion being movementintoareciprocating movement and imparted to rod Ifrom shaft B, the rod draws at the same time increase the length of the shaft G back and forth over racks E E, and 75 reciprocating movement, and this is eifected the teeth of pinions F F, engaging said rack,

by the novel construction and combination of cause shaft G to turn and with it gear H. The parts, hereinafter described and claimed. teeth of the latter engaging rack D cause it In the accompanying drawings, the letter to move the bed forward or backward, accord- A designates the lower portion of a printinging to the motion of shaft G, and as gear H 8o press frame, in one end of Which is journaled is of greater diameter than pinions F F, but

3o a shaft B, provided with a crank b at its inner rotates therewith, it has a greater amount of end, which is adapted to rotate in a plane corperipheral movement than it has reciprocatresponding with a line drawn centrally, loning movement, and the rack D and bed are gitudinally, and vertically through the press. consequently moved forward or backward to 85 Said shaft may be driven by belting, gearing', an extent corresponding to the peripheral or in other proper manner. movement of gear H. The pinions F have a C designates the ordinary bed of the press peripheral movement equal in extent to the movinghorizontally in guides c c on the frame diameterof the circle described by the crank- A; To the under side of this bed and in the pin, plus onehalf their diameter; or, in other 9o central longitudinal line thereof is attached words, if rack D engaged pinions F, as in the 4o a rack-bar D. Below this rackbar and seso-called English stop-cylinder movement, cured iiXedly to the floor or bottom of the at each forward or backward movement the frame are two racks E E', which are parallel bed would travel adistance equal to thediamto but below and on opposite sides of bar D. eter described by the crank-pin, plus one-half 95 These racks, preferably, have slightly -upthe diameter of the pinion; but by employstandingiian ges ee at their outer edges, which ing the gear H, as described, which is about prevent thelateral disengagement of the heretwice the diameter of the pinion F, a moveinafter-described pinions F F therefrom and ment is imparted to the bed twice as greatin support the latter also. 'Pinions F Fare fixed extent, or equal to three times the diameter Ioo on a movable shaft G, upon which is also fixed of the circle described by the wristpin. From 5o a gear H, the latter being intermediate bethis it will be seen that in order to give a pretween pinions F F and projecting between determined amount of movement to the bed racks E E. Pinions F F are formed with an- I can, by the employment of the compound gearing, as described, greatly shorten the length of the crank, the movement of the pinions, and consequently the length of the fixed racks engaging the same, without shortening or retarding the movement. of the bed, and another advantage is that I can place the bed lower. For instance, suppose the bed must move forty-five inches. If the machine was built on the English stopcylinder-movement plan the crankwould have to describe about a thirty-inch circle, and it would be necessary to have thirty inches space between the bedplate rack andthe fixed rack, making an ungainly machine, as it is desirable to have the bed as low as possible, both for convenience and cheapness. If my gearing is employed the crank will only have to describe about a fifteen-inch circle and the bed-plate can run within about fifteen inches of the door, and the length of stroke of t-he crank and gearing being so much lessened, I can shorten the machine that much. I am thus enabled to build a lighter, more compact, and equally as efficient machine as those now in use.

Of course by varying the relative sizes of the gears the movement of the bed can be Y varied while using the same stroke of the connecting-rod, or by having an adjustable connection between the wrist-pin and crank Ican vary the stroke of the bed.

Having described my invention, I claim- In a printing-press, the combinationI of a reciprocating type-bed plate and a rack D, secured to the under surface thereof, with a pair of racks E E, fixed below the bed-plate and parallel with rack D,and the portions or flanges e e outside of and rising above said racks, the shaft G, carrying a central gear Il, meshing with rack spectively, meshing with racks E E, and two rollers ff, running upon the flanges e e. and sustaining the weight of the shaft with its gear and pinions upon said fianges, and the pitman connected to said shaft for shifting it back and forth over racks E E, all substantially as set forth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

JOSEPH L. COX.

WVitnesses:

J AMES BoUGHToN, FRED WELLS.

D, two pinions F F, re- 

